####018011321#### FZUS63 KMQT 231417 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI Issued by National Weather Service Gaylord MI 1017 AM EDT Tue Apr 23 2024 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...29.5 inch low pressure will track across eastern Lake Superior today, weakening to 29.6 inches by the afternoon. Meanwhile a 30.3 inch high pressure shifts into northern Manitoba and into northern Ontario Tuesday evening. This high strengthens to 30.4 inches and quickly shifts south across Lake Superior Tuesday night and Wednesday. Ridging spreads east of the area Thursday ahead of a low pressure system that deepens to 29.2 inches over the Central Plains Friday. Saturday morning the low fills to 29.4 as spins over the Upper Great Lakes. LSZ162-232230- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1017 AM EDT Tue Apr 23 2024 /917 AM CDT Tue Apr 23 2024/ .REST OF TODAY...Northeast winds 20 to 30 knots becoming east 15 to 25 knots late. A chance of rain showers, possibly mixed with snow. Waves 1 to 3 feet building to 5 to 8 feet occasionally to 10 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .TONIGHT...East winds 10 to 20 knots backing northeast after midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet. .WEDNESDAY...East winds 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 1 to 3 feet. .WEDNESDAY NIGHT...East winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .THURSDAY...East winds 10 to 20 knots. Waves building to 2 to 4 feet. .THURSDAY NIGHT...East winds 10 to 20 knots veering southeast after midnight. Waves subsiding to 1 to 3 feet. .FRIDAY...East winds 15 to 25 knots increasing to 20 to 30 knots. A chance of rain showers. Rain showers. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. .SATURDAY...Northeast winds 15 to 25 knots increasing to 20 to 30 knots. Rain showers. A chance of rain showers. Waves building to 3 to 5 feet occasionally to 7 feet. $$ LSZ263-232230- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1017 AM EDT Tue Apr 23 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF TODAY...North winds 20 to 30 knots becoming northeast gales to 35 knots in the afternoon, then diminishing to 15 to 25 knots late. A chance of snow and rain showers. Waves 3 to 6 feet occasionally to 8 feet building to 6 to 9 feet occasionally to 11 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .TONIGHT...Northeast winds 10 to 20 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...East winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 15 to 25 knots veering south after midnight. Waves building to 3 to 5 feet occasionally to 7 feet. .FRIDAY...Southeast winds 20 to 30 knots backing east. A chance of rain showers, then rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...North winds 15 to 25 knots veering northeast. Rain showers. A chance of rain showers. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. $$ LSZ264-232230- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1017 AM EDT Tue Apr 23 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF TODAY...North gales to 35 knots becoming northeast 20 to 30 knots late. A chance of rain showers by late morning. A chance of snow showers. Waves 4 to 7 feet occasionally to 9 feet building to 8 to 11 feet occasionally to 14 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...Northeast winds 20 to 30 knots diminishing to 10 to 20 knots. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 6 to 9 feet occasionally to 11 feet. .WEDNESDAY...Northeast winds 10 to 20 knots veering southeast late. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet. .THURSDAY...South winds 10 to 20 knots becoming southeast 15 to 25 knots by mid afternoon. Waves building to 1 to 3 feet. .THURSDAY NIGHT...Southeast winds 20 to 30 knots veering south after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 20 to 30 knots. A chance of rain showers, then rain showers. Waves building to 4 to 8 feet occasionally to 10 feet. .SATURDAY...Southeast winds 20 to 30 knots backing north. Rain showers. A chance of rain showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. $$ LSZ265-232230- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1017 AM EDT Tue Apr 23 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF TODAY...Northwest gales to 35 knots veering north in the afternoon. A slight chance of rain showers. A chance of snow showers by mid afternoon. Waves calm to 2 feet building to 9 to 12 feet occasionally to 15 feet. .TONIGHT...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...Northeast winds 10 to 20 knots becoming east 5 to 15 knots in the afternoon. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...Southeast winds 15 to 25 knots veering south after midnight. Waves building to 2 to 4 feet. .FRIDAY...Southeast winds 20 to 30 knots. A chance of rain showers, then rain showers. Waves building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...South winds 20 to 30 knots backing north. Rain showers. A chance of rain showers. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. $$ LSZ266-232230- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1017 AM EDT Tue Apr 23 2024 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF TODAY...West gales to 35 knots veering north in the afternoon. A chance of snow showers, possibly mixed with rain. Waves 3 to 6 feet occasionally to 8 feet building to 10 to 14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .TONIGHT...Northeast winds 20 to 30 knots diminishing to 15 to 25 knots late. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .WEDNESDAY...Northeast winds 10 to 20 knots diminishing to 5 to 15 knots in the afternoon, then becoming north less than 10 knots late. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet. .THURSDAY...South winds 5 to 15 knots becoming southeast 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...South winds 20 to 30 knots. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 20 to 30 knots increasing to gales to 35 knots. Rain showers. Waves building to 4 to 8 feet occasionally to 10 feet. .SATURDAY...South winds 20 to 30 knots backing north. Rain showers. A chance of rain showers. Waves subsiding to 2 to 4 feet, then building to 3 to 6 feet occasionally to 8 feet. $$ LSZ267-232230- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1017 AM EDT Tue Apr 23 2024 ...GALE WARNING IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .REST OF TODAY...West winds 10 to 20 knots increasing to 15 to 25 knots in the afternoon, then becoming north gales to 35 knots late. A slight chance of snow showers by mid afternoon. Waves 1 to 3 feet building to 7 to 10 feet occasionally to 13 feet. .TONIGHT...Northeast gales to 35 knots diminishing to 20 to 30 knots after midnight. Freezing spray after midnight. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .WEDNESDAY...Northeast winds 10 to 20 knots backing north in the afternoon, then becoming northwest 5 to 15 knots late. Waves subsiding to calm to 2 feet. .WEDNESDAY NIGHT...Northwest winds 5 to 15 knots backing south after midnight. Waves calm to 2 feet. .THURSDAY...South winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .THURSDAY NIGHT...South winds 15 to 25 knots backing southeast after midnight. Waves building to 3 to 6 feet occasionally to 8 feet. .FRIDAY...Southeast winds 20 to 30 knots increasing to gales to 35 knots. Rain showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY...South winds 20 to 30 knots becoming southwest 15 to 25 knots. Rain showers. Waves subsiding to 2 to 4 feet. $$ LSZ261-232230- MAFOR 2315/ Superior West...GALE WARNING IN EFFECT...11150 11140 11130 14120 11210. A chance of rain showers late this morning, then a chance of snow showers this afternoon. Waves 1 to 3 feet building to 5 to 8 feet this afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet Wednesday morning. Superior North Central...GALE WARNING IN EFFECT...11850 12140 12130 12120 11110. A chance of rain and snow showers late this morning, then a chance of snow showers this afternoon. Waves 4 to 7 feet building to 7 to 11 feet this afternoon. Waves 7 to 10 feet subsiding to 4 to 7 feet tonight. Waves 3 to 5 feet subsiding to 2 to 4 feet Wednesday morning. Superior South Central...GALE WARNING IN EFFECT...11740 12840 12130 12120 11110. A chance of snow showers this afternoon. Waves 1 to 2 feet building to 9 to 12 feet this afternoon. Waves 10 to 13 feet subsiding to 6 to 9 feet tonight. Waves 5 to 7 feet subsiding to 3 to 5 feet Wednesday morning. Superior East...GALE WARNING IN EFFECT...11630 11840 12150 11140 11131 12130. Waves 2 to 4 feet building to 5 to 8 feet this afternoon. Waves 6 to 10 feet tonight. Waves 4 to 7 feet subsiding to 3 to 5 feet Wednesday morning. $$ JPB Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes